Looked it up on Fish Disease website. Skin looks like dropsy, flashing but no white spots, alive one minute , dead the next. Clamped fins, swimming sideways/ upsidedown right before dying. Trouble breathing. I've lost 5 in 24 hours.
Ammonia O
Nitrites O
Nitrates 20+/-
PH 6.8 +/-
Temp 78
KH 5+/-
Just did 50% WC yesterday
Treating with Herbtana by Microbe-Lift because it is safe for scaleless Loach
Have M/F guppies , 15 Cory's, 2 USD cat and Pleco and Borneo Loach (sucker)